<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{{ book }}</title>

</head>
<body>
    <h2>{{ book }}</h2>
    <ul>
        <li>作者：{{ author }}</li>
        <li>年龄：{{ author_age }}</li>
    </ul>
</body>
</html>